Confluence, synnovation, and depauperons in plant diversification

Michael J. Donoghue, Michael Sanderson

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

We review the empirical phylogenetic literature on plant diversification, highlighting challenges in separating the effects of speciation and extinction, in specifying diversification mechanisms, and in making convincing arguments. In recent discussions of context dependence, key opportunities and landscapes, and indirect effects and lag times, we see a distinct shift away from single-point/single-cause 'key innovation' hypotheses toward more nuanced explanations involving multiple interacting causal agents assembled step-wise through a tree. To help crystalize this emerging perspective we introduce the term 'synnovation' (a hybrid of 'synergy' and 'innovation') for an interacting combination of traits with a particular consequence ('key synnovation' in the case of increased diversification rate), and the term 'confluence' for the sequential coming together of a set of traits (innovations and synnovations), environmental changes, and geographic movements along the branches of a phylogenetic tree. We illustrate these concepts using the radiation of Bromeliaceae. We also highlight the generality of these ideas by considering how rate heterogeneity associated with a confluence relates to the existence of particularly species-poor lineages, or 'depauperons.' Many challenges are posed by this re-purposed research framework, including difficulties associated with partial taxon sampling, uncertainty in divergence time estimation, and extinction.

Original languageEnglish (US)
Pages (from-to)260-274
Number of pages15
JournalNew Phytologist
Volume207
Issue number2
DOIs
StatePublished - Jul 1 2015

Fingerprint

Bromeliaceae
extinction
phylogeny
Uncertainty
uncertainty
Radiation
Research
sampling

Keywords

  • Diversification
  • Extinction rate
  • Phylogeny
  • Radiation
  • Speciation rate
  • Vascular plants

ASJC Scopus subject areas

  • Plant Science
  • Physiology

Cite this

Confluence, synnovation, and depauperons in plant diversification. / Donoghue, Michael J.; Sanderson, Michael.

In: New Phytologist, Vol. 207, No. 2, 01.07.2015, p. 260-274.

Research output: Contribution to journalArticle

Donoghue, Michael J. ; Sanderson, Michael. / Confluence, synnovation, and depauperons in plant diversification. In: New Phytologist. 2015 ; Vol. 207, No. 2. pp. 260-274.
@article{798edf0fd2ff44acb2639b8cb8facd92,
title = "Confluence, synnovation, and depauperons in plant diversification",
abstract = "We review the empirical phylogenetic literature on plant diversification, highlighting challenges in separating the effects of speciation and extinction, in specifying diversification mechanisms, and in making convincing arguments. In recent discussions of context dependence, key opportunities and landscapes, and indirect effects and lag times, we see a distinct shift away from single-point/single-cause 'key innovation' hypotheses toward more nuanced explanations involving multiple interacting causal agents assembled step-wise through a tree. To help crystalize this emerging perspective we introduce the term 'synnovation' (a hybrid of 'synergy' and 'innovation') for an interacting combination of traits with a particular consequence ('key synnovation' in the case of increased diversification rate), and the term 'confluence' for the sequential coming together of a set of traits (innovations and synnovations), environmental changes, and geographic movements along the branches of a phylogenetic tree. We illustrate these concepts using the radiation of Bromeliaceae. We also highlight the generality of these ideas by considering how rate heterogeneity associated with a confluence relates to the existence of particularly species-poor lineages, or 'depauperons.' Many challenges are posed by this re-purposed research framework, including difficulties associated with partial taxon sampling, uncertainty in divergence time estimation, and extinction.",
keywords = "Diversification, Extinction rate, Phylogeny, Radiation, Speciation rate, Vascular plants",
author = "Donoghue, {Michael J.} and Michael Sanderson",
year = "2015",
month = "7",
day = "1",
doi = "10.1111/nph.13367",
language = "English (US)",
volume = "207",
pages = "260--274",
journal = "New Phytologist",
issn = "0028-646X",
publisher = "Wiley-Blackwell",
number = "2",

}

TY - JOUR

T1 - Confluence, synnovation, and depauperons in plant diversification

AU - Donoghue, Michael J.

AU - Sanderson, Michael

PY - 2015/7/1

Y1 - 2015/7/1

N2 - We review the empirical phylogenetic literature on plant diversification, highlighting challenges in separating the effects of speciation and extinction, in specifying diversification mechanisms, and in making convincing arguments. In recent discussions of context dependence, key opportunities and landscapes, and indirect effects and lag times, we see a distinct shift away from single-point/single-cause 'key innovation' hypotheses toward more nuanced explanations involving multiple interacting causal agents assembled step-wise through a tree. To help crystalize this emerging perspective we introduce the term 'synnovation' (a hybrid of 'synergy' and 'innovation') for an interacting combination of traits with a particular consequence ('key synnovation' in the case of increased diversification rate), and the term 'confluence' for the sequential coming together of a set of traits (innovations and synnovations), environmental changes, and geographic movements along the branches of a phylogenetic tree. We illustrate these concepts using the radiation of Bromeliaceae. We also highlight the generality of these ideas by considering how rate heterogeneity associated with a confluence relates to the existence of particularly species-poor lineages, or 'depauperons.' Many challenges are posed by this re-purposed research framework, including difficulties associated with partial taxon sampling, uncertainty in divergence time estimation, and extinction.

AB - We review the empirical phylogenetic literature on plant diversification, highlighting challenges in separating the effects of speciation and extinction, in specifying diversification mechanisms, and in making convincing arguments. In recent discussions of context dependence, key opportunities and landscapes, and indirect effects and lag times, we see a distinct shift away from single-point/single-cause 'key innovation' hypotheses toward more nuanced explanations involving multiple interacting causal agents assembled step-wise through a tree. To help crystalize this emerging perspective we introduce the term 'synnovation' (a hybrid of 'synergy' and 'innovation') for an interacting combination of traits with a particular consequence ('key synnovation' in the case of increased diversification rate), and the term 'confluence' for the sequential coming together of a set of traits (innovations and synnovations), environmental changes, and geographic movements along the branches of a phylogenetic tree. We illustrate these concepts using the radiation of Bromeliaceae. We also highlight the generality of these ideas by considering how rate heterogeneity associated with a confluence relates to the existence of particularly species-poor lineages, or 'depauperons.' Many challenges are posed by this re-purposed research framework, including difficulties associated with partial taxon sampling, uncertainty in divergence time estimation, and extinction.

KW - Diversification

KW - Extinction rate

KW - Phylogeny

KW - Radiation

KW - Speciation rate

KW - Vascular plants

UR - http://www.scopus.com/inward/record.url?scp=84931462508&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84931462508&partnerID=8YFLogxK

U2 - 10.1111/nph.13367

DO - 10.1111/nph.13367

M3 - Article

C2 - 25778694

AN - SCOPUS:84931462508

VL - 207

SP - 260

EP - 274

JO - New Phytologist

JF - New Phytologist

SN - 0028-646X

IS - 2

ER -